I think that grower is another name /synonym for chick feed . This term in mainly used for broiler feed. Broilers normally get slaughtered before they get to adulthood.Hi. Chicks get chick feed, all of them. When getting adult food I would just give them All Layer. You can mix oyster shell into it. I don't think the roos will eat it. All Flock is okay for everyone. I have never used Grower so I don't have any info on that. If you need protein, freeze dried meal worms (?) is up to 50% protein.
The amount of proteins is often a bit higher than the organic chick feed I buy.